var isNN = (navigator.appName.indexOf("Netscape") != -1);
var isIE = (navigator.appName.indexOf("Microsoft") != -1);

function showHideDiv(obj)
{
  var s;
  if(isIE)
  {
    s = document.all[obj].style.display;
    if(s == 'block')
    {
      s = 'none';
    }else{
      s = 'block';
    }
    document.all[obj].style.display = s;
  }else{
  	obj = document.getElementById(obj);
    s = obj.style.display;
    if(s == 'block')
    {
      s = 'none';
    }else{
      s = 'block';
    }
    obj.setAttribute('style','display:'+s);
  }
}

function openWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

// preload navigation images
//MM_preloadImages('/images/furniture/nav/subscribe2.gif','/images/furniture/nav/subscribe2.gif','/images/furniture/nav/how-it-works2.gif','/images/furniture/nav/choreography2.gif','/images/furniture/nav/about-us2.gif','/images/furniture/nav/contact-us2.gif');


// if not a number, toss an alert and reset the field to 0
function validateInt(field,orig)
{
  if(isNaN(field.value))
  {
    alert("That is not a valid quantity.")
    field.value = orig;
    return false;
  }
}

// if blank, toss an alert
function validateNotBlank(field,desc){
  if(field.value == "")
  {
    alert("The " + desc + " can not be blank.");
    return false;
  }
}